HQUA TWS-24S
#6 in Over 12 GPMFull review
A cheap high flow unit for a large home that wants a UV backstop in a small space. The rating is unverified, so size it generously.
Amazon $499.99$499.99
2.2/5
The larger of iSpring’s LED units, for a home that wants mercury free UV with 1 in plumbing. As with all LED units here, little about its dose is published.
- 13.2 GPMFlow
- NoNSF/ANSI 55
- LEDLamp
- 1 yearWarranty
Check price at Amazon$499.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- No mercury lamp to change every year; the LED module is rated 8,000 hours of running time
- Starts instantly when water flows, with no warm up and no heating of standing water
- 1 in ports and 13.2 GPM suit a bigger home than most LED units
- Sold and shipped by Amazon
Cons
- No UV dose, power, pressure rating or monitoring details are published
- Costs about $200 more than iSpring’s 12 GPM LED unit for 1.2 GPM more
- Not NSF certified
The iSpring LED UV family
Every iSpring LED UV model we rank, smallest first. Ratings compare each against its own flow.
| Model | Flow | Rating | Price |
|---|---|---|---|
| iSpring UVF20 LED | 12 GPM | 2.3/5 | $309.99 |
| iSpring UVF50 LED (this one) | 13.2 GPM | 2.2/5 | $499.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its flow. How we rank explains each one.
Specifications
| Model number | UVF50 |
|---|---|
| Disinfection | |
| Rated flow | 13.2 GPM |
| NSF/ANSI 55 | No |
| Lamp | LED |
| Lamp life | 8,000 hours |
| Build | |
| Ports | 1 in |
| Warranty | 1 year |
Alternatives in this flow
Bluonics 110W UV 24 GPM
#7 in Over 12 GPMFull review
The budget way to put UV on a large home’s main line. It covers the flow on paper, but without a sensor you’re trusting the lamps and your maintenance.
Amazon $485$485
Purcooflow WHF25V LED
#9 in Over 12 GPMFull review
A low cost, mercury free UV stage for a home that already filters its water. A new product with little track record, so test the water after installing it.
Amazon $269.99$269.99
Compare
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